TWI747335B - Vacuum cleaner - Google Patents

Abstract

A vacuum cleaner is disclosed. The vacuum cleaner according to the present disclosure includes a main body and a suction nozzle. The suction nozzle includes a housing, a driver, a rotating brush, and a detachable cover. A pressing button is mounted in the housing. The detachable cover is rotated about the rotational axis of the rotating brush to be mounted in the housing. The pressing button selectively blocks rotation of the detachable cover.

Description

Vacuum cleaner

The present invention relates to a vacuum cleaner, and more specifically, to a vacuum cleaner capable of sucking up dust even from a smooth floor with a rotating brush.

The vacuum cleaner has different cleaning functions according to the type of brush assembled.

In order to effectively clean rough carpets, it is suitable to use hard plastic brushes for carpets.

In order to effectively clean smooth carpets, it is recommended to use soft flannel floor brushes.

When using this soft flannel floor brush, it can prevent the hard brush from leaving scratches on the floor. In addition, when the flannel brush is rotated for cleaning, even fine dust on the floor can be swept into the air and sucked into the vacuum cleaner.

For this reason, Korean Patent Application Publication No. 2019-0080855 (hereinafter referred to as "Prior Art 1") discloses a vacuum cleaner. The vacuum cleaner of Prior Art 1 includes a main body and a suction nozzle. The suction nozzle includes a housing, a rotating cleaning unit, a driver, and a rotating support unit.

The housing includes a first side surface cover and a second side surface cover. Both the first side surface cover and the second side surface cover are coupled to both side surfaces of the cavity. The rotation support unit is provided in the second side surface cover. The rotation support unit provided in the opposite side of the driver rotatably supports the rotation cleaning unit.

The rotating cleaning unit uses multiple bristles to move the dust on the floor back. Dust and debris such as hair can easily adhere to the bristles of the rotating cleaning unit. Therefore, the user must frequently clean the rotary cleaning unit. Accordingly, the coupling structure between the second side surface cover and the main body should be simple. The coupling force is formed between the second side surface cover and the main body through a locking structure such as a hook.

When using a vacuum cleaner, the rotating cleaning unit rotates and generates friction with the floor. The material of the floor surface can be made of synthetic resin or wood. Generally speaking, users can clean the floor by moving the nozzle back and forth. When changing the direction of the suction nozzle, the suction nozzle can move left and right. Or when When changing the direction of the suction nozzle, the suction nozzle can move left and right and diagonally.

When using a vacuum cleaner, the reaction force and friction of the floor will continue to act on the rotating cleaning unit. When the direction of the suction nozzle is changed, the reaction force and friction force of the floor can be applied to the rotary cleaning unit along its axial direction. The coupling force between the second side surface cover and the main body must be much greater than the axial force applied to the rotary cleaning unit.

However, with the use of a locking structure such as a hook, the increased coupling force between the second side surface cover and the main body is limited. In addition, if a fastening member such as a bolt or the like is used to increase the coupling force between the second side surface cover and the main body, it will be difficult for the user to decouple the rotary cleaning unit and the main body.

-Prior art 1: Korean Patent Publication No. 2019-0080855 (July 1, 2019)

An aspect of the present invention aims to provide a vacuum cleaner in which the detachable cover can be easily coupled and decoupled from the side surface of the housing.

Another aspect of the present invention aims to provide a vacuum cleaner in which the detachable cover and the housing form a coupling force which is much greater than the axial force acting on the rotating brush.

Another aspect of the present invention aims to provide a vacuum cleaner in which the detachable cover can be easily decoupled from the housing even if no special tools are provided.

In the vacuum cleaner according to an embodiment of the present invention, pressing the button can selectively block the rotation of the detachable cover. Therefore, even when no special tools are provided, the detachable cover can be easily coupled and decoupled from the housing.

The vacuum cleaner according to an embodiment of the present invention may include a main body and a suction nozzle.

The main body can produce an air pressure difference. The blower can be arranged inside the main body.

The suction nozzle can suck up dust from the floor by using the air pressure difference.

The suction nozzle may include a housing, a driver, a rotating brush, and a detachable cover.

An inlet may be formed in the housing through which dust moves into the main body. The entrance may be formed behind the housing. The inlet can be cylindrical.

When the air blower generates an air pressure difference, dust and debris on the floor can move into the main body through the inlet of the suction nozzle.

The drive can be installed in the housing. The driver can rotate the first shaft member. The drive may include a motor and a transmission unit.

The motor can generate rotational force. The motor can be set as a brushless direct current (BLDC) motor. The transmission unit may transmit the rotational movement of the motor to the first shaft member.

The rotating brush may rotate when the first shaft member is engaged.

The rotating brush may include a body, a brush member, and a second shaft member.

The body can be formed into a hollow cylindrical shape. The central axis of the body can be used as the central axis of the rotating brush. The body can form a uniform rotational inertia along the circumferential direction of the body.

The brush member may be attached on the outer surface of the body to contact the floor. The brush member may include a plurality of bristles. When the body rotates, a plurality of bristles can move the dust and debris on the floor backward. The plurality of bristles may include fiber bristles and metal bristles.

The second shaft member may be provided in the opening on one side of the body.

The second shaft member may engage the first shaft member. The first shaft member may be inserted into the second shaft member to transmit the rotational movement to the second shaft member. The rotation axis of the first shaft member and the rotation axis of the rotating brush may be located on the same line.

The detachable cover can rotatably support the rotating brush. The body may be rotatably connected to the detachable cover through the third shaft member. The detachable cover is rotatable about the rotation axis of the rotating brush to be detachably coupled to the housing.

A plurality of first protruding parts may be formed in the detachable cover. The protruding ribs and the hub may be formed on the inner surface of the detachable cover. The protruding ribs may be formed along the circumferential direction of the hub. The first protruding part may be formed in the protruding rib.

The guide rail may be formed in the housing along the circumferential direction of the housing.

The guide rail can guide the first protrusion to rotate around the rotation axis. The first protruding part may be guided to the outer surface of the guide rail to rotate bidirectionally around the rotation axis.

A plurality of first walls may be formed in the guide rail. The first wall may protrude from the outer surface of the guide rail.

The first wall can block the movement of the first protruding part in the direction of the rotation axis. Therefore, the detachable cover and the housing can form a coupling force that is far greater than the axial force acting on the rotating brush.

A plurality of second walls may be formed in the guide rail. The second wall body may protrude from the outer surface of the guide rail.

The second wall can block the rotation of the first protrusion around the rotation axis.

The second protruding part may be formed in the housing.

The guide groove may be formed in the detachable cover along the circumferential direction of the housing.

The inner surface of the guide groove can guide the rotation of the second protrusion about the rotation axis.

The push button may be formed in the housing.

The third protruding part may be formed in the detachable cover.

The push button may include a button part and a first blocking part.

The first fitting groove may be formed in the housing, and the button part is inserted into the first fitting groove. The user can push the button part.

The first blocking part may extend from the button part. The first blocking part may block the rotation of the third protruding part about the rotation axis.

When the user presses the button part, the first blocking part may deviate from the rotation route of the third protruding part. Therefore, the detachable cover can be easily coupled and decoupled from the housing by pushing the button part by the user.

The button part may be rotatably fitted into the housing.

A pair of shaft parts may be formed in the button part. A pair of shaft grooves may be formed on the inner surface of the first fitting groove. The shaft part can be inserted into the shaft groove. The button part can rotate around the shaft part inserted into the shaft groove.

The second fitting groove may be formed in the housing. The first blocking part is rotatable around the shaft part in the second assembly groove.

The push button may include an elastic member. The push button can be placed between the button part and the housing.

The elastic member can generate a force between the shaft part and the first blocking part to push the button part outward. The first blocking portion can be arranged on the rotation route of the third protruding structure through the elastic force of the elastic member.

The fourth protruding part may be formed in the detachable cover.

The push button may include a second blocking part. The second blocking part may extend from the button part. The second blocking part may block the movement of the fourth protruding part in the direction of the rotation axis.

Meanwhile, a vacuum cleaner according to another embodiment of the present invention may include a main body, and a suction nozzle.

The main body can produce an air pressure difference. The blower can be arranged in the main body.

The suction nozzle can suck up dust from the floor by using the air pressure difference. When the air blower generates a difference in air pressure, dust and debris on the floor can move to the main body through the inlet of the suction nozzle.

The suction nozzle may include a housing, a driver, and a detachable cover.

The shell can roll on the floor through a plurality of rollers. Press the button can be assembled in the shell middle.

The drive can be installed in the housing. The drive can rotate the rotating brush.

The drive may include a motor and a transmission unit. The motor can generate rotational force. The motor can be set as a brushless direct current (BLDC) motor. The transmission unit can transmit the rotational movement of the motor to the rotating brush.

The detachable cover can rotatably support the rotating brush. The body can be rotatably connected to the detachable cover through the third shaft member. The detachable cover is rotatable about the rotation axis of the rotating brush to be detachably coupled to the housing. Therefore, the detachable cover can be easily coupled and decoupled from the inner surface of the housing.

Pressing the button can selectively block the rotation of the detachable cover. Therefore, even when no special tools are provided, the detachable cover can be easily coupled and decoupled from the housing.

According to an embodiment of the present invention, when the first protruding part rotates around the rotation axis of the rotating brush along the guide rail, the first wall body can block the movement of the first protruding part in the direction of the rotation axis, and the button part The extended first blocking portion can block the rotation of the third protruding portion around the rotation axis, so that the coupling force between the detachable cover and the housing is formed or removed through the rotation of the detachable cover.

According to the embodiment of the present invention, since the first wall provided along the circumferential direction of the rotation axis of the rotating brush blocks the movement of the first protruding part toward the rotation axis, the first wall can rotate around the rotating brush The axial force acting on the rotating brush by the axis is evenly distributed, so that the decoupling and shaking of the detachable cover caused by the axial force acting on the rotating brush can be blocked.

According to the embodiment of the present invention, since pressing the button can selectively block the rotation of the detachable cover, even the elderly or children who do not use tools such as screwdrivers can easily remove the detachable cover from the housing through a relatively simple movement. Coupled.

1: Vacuum cleaner

10: Nozzle

20: main body

21: handle

22: Dust box

30: Extension tube

100: shell

101: suction space

102: independent space

110: main shell

110A: front

110H: Through hole

111: entrance

111A: The seventh boundary surface

112: Guide rail

112A: The first wall

112B: second wall

113: The second protruding part

120: bottom shell

121: first bottom shell

121A: The first wall surface

121B: The second wall surface

122: second bottom shell

130: Assemble the shell

131: Lid

132: Assembly Department

133: middle position

133A: Fourth boundary surface

133B: The sixth boundary surface

140: Support shell

141: Press the button

141A: Button section

141B: Elastic member

141C: The first stop

141D: Second blocking part

141E: Shaft part

141H1: The first assembly slot

141H2: The second assembly slot

141H3: Third assembly slot

141H4: Shaft groove

150: Side surface cover

200: drive

210: bracket

220: Motor

230: transmission unit

231: The first belt transmission unit

231A: Drive pulley

231B: The first intermediate pulley

231C: The first belt

232: The second belt transmission unit

232A: driven pulley

232B: second intermediate pulley

232C: second belt

232D: first shaft member

232DA: Wheel hub

232DB: The first transmission part

232D1: first surface

232D2: third surface

232D3: Fifth surface

C1: The first contact surface

C2: second contact surface

300: Brush module

310: Rotating brush

311: Body

311A: protrusion

312: Brush component

313: Second shaft member

313A: Shaft

313B: Second Transmission Department

313B1: second surface

313B2: Fourth surface

313A1: sixth surface

313B3: The seventh surface

313H, 314H: Insert slot

314: Third shaft member

320: Removable cover

321: The cover body

322: Wheel Hub

323: protruding ribs

324: The first protruding part

325: guide slot

326: The third protruding part

326A: Inclined surface

326B: Acceptance

327: The fourth protruding part

400: Connector

401: Channel

410: Insertion part

411: Socket through hole

420: The first connection part

421: Second boundary surface

430: second connection part

431: release button

432: Joint

440: Coupling part

441: Straight Pipe Department

441A: Acceptance Department

442: protrusion

442A: The first boundary surface

442B: The third boundary surface

442C: Fifth boundary surface

442D: Eighth boundary surface

443: Spacing protrusion

450: Flexible straight tube

451: Elastic tube

452: Coil Spring

W1: first scroll wheel

W2: second scroll wheel

T: Insert part

N: Fastening part

H: Through hole

A: Fixed shaft

B: Bearing

R: Intermediate pulley

S: Buckle

P: Protruding part

PA: pulley shaft

F: Rotational force

F1, F1’: force

F2: Friction component

F1x’: mobile component

F1y’: rotation component

Fi: rotational inertia

When reading, referring to the accompanying drawings, the foregoing and other aspects, functions and advantages of the present invention will be more clearly understood, as well as the detailed description of the following embodiments. The drawings illustrate exemplary embodiments of the present invention. However, the reader should understand that the present invention is not intended to limit the details shown, because various modifications and structural changes may not violate the spirit of the present invention and are limited to the claims. Within the equivalent range. The same component symbols or marks are used in different drawings to indicate similar or identical items.

Fig. 1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention.

Fig. 2 is a perspective view of the suction nozzle of the vacuum cleaner of Fig. 1 viewed from above.

Fig. 3 is a perspective view of the suction nozzle of the vacuum cleaner of Fig. 1 viewed from below.

Fig. 4 is an exploded perspective view of the suction nozzle of Fig. 2.

Fig. 5 is a cross-sectional view of the suction nozzle of Fig. 2.

Fig. 6 is an exploded perspective view of the assembly housing and connector of the suction nozzle of Fig. 4 viewed from above.

Fig. 7 is an exploded perspective view of the assembly housing and connector of the nozzle of Fig. 4 viewed from below.

Fig. 8 is a perspective view of an assembled state of the assembly housing of the nozzle of Fig. 4 and the connector.

Fig. 9 is a perspective view of the assembled state of the main housing, the assembly housing, and the connector of the nozzle of Fig. 4.

Fig. 10 is a partial cross-sectional view of the assembled state of the main housing, the assembly housing, and the connector of the nozzle of Fig. 9.

Fig. 11 is a partially exploded perspective view of the main housing and the driver of Fig. 5.

Fig. 12 is an exploded perspective view of the driver of Fig. 11.

Fig. 13 is a side view of the driver of Fig. 11.

Fig. 14 is a bottom view of the suction nozzle of Fig. 2.

Fig. 15 is a cross-sectional view of the suction nozzle of Fig. 14 cut along the line A to A'.

Fig. 16 is a perspective view of the fur brush module of Fig. 4.

Fig. 17 is an exploded perspective view of the fur brush module of Fig. 16.

Fig. 18 is a perspective view of the nozzle module of Fig. 2 with the brush module separated.

Fig. 19 is a perspective view of the nozzle module of Fig. 2 in which the housing and the detachable cover are coupled.

Fig. 20 is a perspective view of the nozzle module of Fig. 2 in which the housing and the detachable cover are decoupled.

21 is a perspective view of the nozzle module of FIG. 18, in which the rotating brush is not shown in the figure.

Fig. 22 is a perspective view of the nozzle module of Fig. 21, in which the pressing button is separated.

Fig. 23 is a perspective view of the detachable cover of Fig. 21.

Fig. 24 is a side view of the suction nozzle of Fig. 20.

Fig. 25 is a side view of the suction nozzle of Fig. 19, in which the pressing button is pressed.

Fig. 26 is a side view of the suction nozzle of Fig. 19.

Fig. 27 is a perspective view of the driver of the brush module and the nozzle module of Fig. 19.

Fig. 28 is a side view of the driver of Fig. 27.

Fig. 29 is a perspective view of the first shaft member of Fig. 28.

Fig. 30 is a side view of the brush module of Fig. 27.

Fig. 31 is a partial perspective view of the second shaft member of Fig. 30.

Fig. 32 is a cross-sectional view of the nozzle module of Fig. 19.

Fig. 33 is a cross-sectional view of the nozzle module of Fig. 32 cut along the line B to B'.

Fig. 34 is a cross-sectional view of the nozzle module of Fig. 32 cut along the line C to C'.

Fig. 35 is a cross-sectional view of the nozzle module of Fig. 32 cut along the line D to D'.

Fig. 36 is a graph showing the force acting on the first contact surface.

Fig. 37 is a graph showing the force transmitted to the second surface.

Fig. 38 is a graph showing the force acting on the second contact surface.

With reference to the following descriptions and accompanying drawings, the functions and advantages of the present invention and its implementation methods will become apparent. However, the present invention is not limited to the aspect disclosed in the specification, and can be implemented in various different forms. These aspects are intended to fully provide the description of the present invention and fully convey the scope of the present invention to those with ordinary knowledge in the technical field. Note that the scope of the present invention is defined by the claims.

The shapes, sizes, ratios, angles, and number of components described in the drawings are just examples, and therefore, the present invention is not limited to the details shown in the drawings. Throughout this specification, the same element symbols represent the same elements.

For describing the present invention, if the detailed description of the prior art unnecessarily obscures the main points of the present invention, the detailed description may be omitted.

The terms used in this specification are intended to only describe specific example embodiments, and are not intended to be limiting. As stated in the specification, the singular forms "one" and "the" may be intended to include the plural forms, unless the context clearly indicates otherwise. The terms "include", "include" and "have" are all inclusive, and therefore stipulate the existence of the described functions, integers, steps, operations, elements and/or components, but do not exclude the existence or addition of one or more other functions , Integers, steps, operations, elements, components, and/or groups. The method steps, processes, and operations described in this specification do not necessarily have to be discussed or explained in a specific order to explain their performance, unless they are specifically designated as the order of execution. The reader can also understand that other or alternative steps can be used in the process.

When an element or layer is referred to as being "on" another element or layer, or is "bonded", "connected", or "coupled" to another element or layer, the element or layer can be directly on the other element or layer, or It is joined, connected, coupled to another element or layer, or there may be intermediate elements or layers. On the contrary, when it is said that a component is “directly on another component or layer”, or “directly bonded”, “directly connected”, or “directly coupled” to another component or layer. In the case of one element or layer, there may be no intermediate elements or layers. Other words describing the relationship between components should be interpreted in a similar way (such as "between" and "directly between", "adjacent" and "directly adjacent", etc.). The term "and/or" used in this specification includes any and all combinations of more than one related listed item.

The terms "connected" and "coupled" are not limited to physical or mechanical connection or coupling, and may include electrical connection or coupling, either directly or indirectly. The connection can be a permanent connection of objects or a releasable connection. The term "communication coupling" is defined as: direct or indirect connection through intermediate components, and the connection is not limited to the physical connection, but it will regulate the transmission of data, fluids or other substances between the above-mentioned components.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or parts, these elements, components, regions, layers and/or parts should not be limited to these terms. These terms are only used to distinguish a certain element, component, region, layer and/or part from another element, component, region, layer and/or part. The terms "first", "second" and other numerical terms used in this specification do not indicate a sequence or order, unless the context clearly indicates otherwise. Therefore, the first element, component, region, layer or portion described below can all be referred to as the second element, component, region, layer or portion, and does not violate the instructions of the exemplary embodiments.

Space-related terms, such as "internal", "external", "below", "below", "below", "above", "above" and other words can be used here to describe something as shown in the figure The relationship between an element or feature and other elements or features. Spatially related terms can be used to encompass different directions of the device in use or operation, as well as the directions shown in the figures. For example, if the device in the figure is turned over, the position of the element described as "below" or the element or feature "below" will be "above" other elements or features. Therefore, the example term "below" can encompass the directions of above and below. The device can be oriented in other ways (rotated by 90 degrees or other directions), and the spatially related descriptors used here are explained accordingly.

The term "or" used herein should be interpreted as including one or any combination thereof. Therefore, "A, B or C" can refer to any combination of the following: "A; B; C; A and B; A and C; B and C; A, B and C". An exception to this definition will only occur when a combination of elements, functions, steps, or actions are mutually exclusive in some way.

Next, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the known functions or features will not be repeated to clarify the main points of the present invention.

Fig. 1 is a perspective view of a vacuum cleaner 1 according to an embodiment of the present invention.

As shown in FIG. 1, the vacuum cleaner 1 according to an embodiment of the present invention may include a main body 20; and suction nozzle 10.

The suction nozzle 10 may be connected to the main body 20 through an extension tube 30. The suction nozzle 10 may be directly connected to the main body 20. The user can grasp the handle 21 formed in the main body 20 and move the suction nozzle 10 back and forth on the floor.

The main body 20 can generate an air pressure difference. The blower may be provided inside the main body 20. When the air blower generates an air pressure difference, dust and debris on the floor can move to the main body 20 through the inlet 111 of the suction nozzle 10 and the extension tube 30.

The centrifugal dust collector may be provided inside the main body 20. Dust and debris can be contained in the dust box 22.

Fig. 2 is a perspective view of the suction nozzle 10 of the vacuum cleaner 1 of Fig. 1 viewed from above. Fig. 3 is a perspective view of the suction nozzle 10 of the vacuum cleaner 1 of Fig. 1 viewed from below. Fig. 4 is an exploded perspective view of the suction nozzle 10 of Fig. 2.

The suction nozzle 10 can suck up the dust on the floor by using the air pressure difference. The suction nozzle 10 includes a housing 100, a driver 200, a brush module 300, and a connector 400.

Next, for easy understanding of the present invention, the side of the suction nozzle 10 provided with the rotating brush 310 is called the front of the suction nozzle 10, and the other side of the suction nozzle 10 provided with the connector 400 is called the front of the suction nozzle 10 Back or back.

The suction nozzle 10 can be assembled in the following order. First, the connector 400 can be assembled first. Then, the connector 400 and the assembly housing 130 may be assembled together.

The assembly housing 130 may be rotatably assembled in the connector 400. Then, the driver 200 may be coupled to one side of the main housing 110.

After that, the assembly housing 130 may be coupled to the upper portion of the main housing 110. Then, the bottom case 120 may be coupled to the lower part of the main housing 110. Then, the support housing 140 may be coupled to the lower part of the main housing 110.

Next, the pressing button 141 may be assembled in the support housing 140. Then, the side surface cover 150 may be coupled to one side of the main housing 110.

Finally, the first shaft member 232D can be inserted into the second shaft member 313 of the rotating brush 310, and the detachable cover 320 is detachably coupled to the other end of the main housing 110. Then, the assembly of the suction nozzle 10 can be completed.

Fig. 5 is a cross-sectional view of the suction nozzle 10 of Fig. 2.

As shown in FIGS. 4 and 5, the housing 100 can guide dust and debris on the floor to the channel 401 of the connector 400.

The housing 100 may include a main housing 110, a bottom housing 120, an assembly housing 130, and a support housing 140.

The main housing 110 may form an inlet 111 through which dust moves to the main body 20. The inlet 111 may be formed behind the main housing 110. The inlet 111 may be formed in a cylindrical shape. The rotating brush 310 may be assembled in front of the main housing 110.

The front of the main housing 110 (hereinafter referred to as "front 110A") may be formed to cover the upper part of the rotating brush 310. The front portion 110A may form a wall that extends along the circumferential direction of the rotation axis of the rotating brush 310. The front part 110A may be spaced apart from the upper part of the rotating brush 310 by a certain distance.

The rotating brush 310 may be rotated by the driver 200. The rotating brush 310 can push dust and debris on the floor to the back of the rotating brush 310. The dust and debris pushed behind the rotating brush 310 can easily enter the entrance 111. The main housing 110 provided between the rotating brush 310 and the inlet 111 may cover the floor surface.

Between the rotating brush 310 and the inlet 111, the housing 100 can form a space (hereinafter referred to as "suction space 101") between the housing 100 and the floor. Except for the gap between the housing 100 and the floor, the suction space 101 may be separated from the outside. The dust and debris sucked into the space 101 can enter the channel 401 through the inlet 111.

As shown in FIGS. 4 and 5, the bottom case 120 and the main case 110 may form a suction space 101. The bottom case 120 may form a first bottom case 121 and a second bottom case 122.

The first bottom shell 121 and the second bottom shell 122 disposed between the rotating brush 310 and the inlet 111 can form a wall, and the wall can guide the dust and debris in the suction space 101 to the inlet 111.

The bottom case 120 and the support case 140 may be coupled to the lower part of the main case 110 through bolts. In the main housing 110, a fastening portion (N) where bolts are fastened with screws may be formed. The insertion part (T) into which the bolt is inserted may be formed in the first bottom case 121, the second bottom case 122 and the support case 140.

The first bottom shell 121 may include a first wall surface 121A and a second wall surface 121B.

The upper part of the first wall surface 121A may be arranged in close contact with the front part 110A. The front surface of the first wall surface 121A may be in contact with the brush member 312. When the brush member 312 rotates, dust and debris attached to the brush member 312 may collide with the lower portion of the first wall surface 121A, thereby falling from the brush member 312.

The second wall surface 121B and the second bottom shell 122 arranged between the left and right sides of the entrance 111 and the floor can form a wall, and the wall can guide the dust and debris in the suction space 101 to the entrance 111. A pair of first rollers (W1) may be assembled in the second bottom case 122.

FIG. 6 is an exploded perspective view of the assembly housing 130 and the connector 400 of the suction nozzle 10 of FIG. 4 viewed from above. FIG. 7 is an exploded perspective view of the assembly housing 130 and the connector 400 of the suction nozzle 10 of FIG. 4 viewed from below.

As shown in FIGS. 6 and 7, the assembly housing 130 may include a cover portion 131, an assembly portion, 132 and an intermediate portion 133.

The cover part 131 may be a part assembled on the upper part of the main housing 110. In either of the cover part 131 or the main housing 110, a protruding part (P) may be formed. In the cover part 131 or the other of the main housing 110, a through hole (H) may be formed. When the protruding part (P) is inserted into the through hole (H), the cover part 131 may be fitted in the upper part of the main housing 110.

The fitting part 132 may be a part surrounding the inlet 111 and the coupling part 440. The fitting part 132 may be formed in a ring shape.

The intermediate portion 133 may protrude from the inner surface of the fitting portion 132. The intermediate portion 133 may be a part rotatably fitted in the connector 400. The intermediate portion 133 may protrude from the inner surface of the fitting portion 132 along the circumferential direction of the fitting portion 132.

As shown in FIGS. 4 and 5, the support housing 140 can support the suction nozzle 10 and the lower portion of the connector 400.

In the support housing 140, a second roller (W2) may be assembled. The second roller (W2) can rotate and roll on the floor with a pair of first rollers (W1).

The pair of first rollers (W1) and second rollers (W2) can provide rolling motion to the suction nozzle 10 and the connector 400. The pressing button 141 may be fitted in the support housing 140.

The connector 400 may allow relative rotation of the main body 20 and the suction nozzle 10. In addition, the connector 400 may form a passage 401 in which dust enters the main body 20.

As shown in FIGS. 6 and 7, the connector 400 may include an insertion part 410, a first connection part 420, a second connection part 430, a coupling part 440, and an elastic straight tube 450.

Each of the first connection part 420 and the second connection part 430 may be formed in a tube shape. Both the first connection part 420 and the second connection part 430 may be rotatably coupled to each other.

Although not shown in the figure, a pair of protruding portions may be formed in any one of the first connecting portion 420 and the second connecting portion 430. In addition, a pair of grooves may be formed in the other of the first connection part 420 and the second connection part 430.

The pair of protruding parts may be formed on both sides of the outer surface of the second connecting part 430. The pair of concave The groove may be formed on both sides of the inner surface of the first connection part 420. The protruding parts can be inserted into the grooves. The second connection part 430 may rotate around the protruding part inserted into the groove. The reference symbol "X" in FIG. 6 represents the extension line of the rotation axis formed by the protrusions.

As shown in FIG. 5, in the upper portion of the second connection part 430, a release button 431 may be formed. The release button 431 may be connected to the joint part 432. In the upper portion of the second connection part 430, a through hole may be formed. The engaging portion 432 may protrude into the second connecting portion 430 through the through hole.

In the extension tube 30, a through hole into which the engaging portion 432 is inserted may be formed. The movement of the extension tube 30 may be blocked by the joint 432.

When the user presses the release button 431, the engaging portion 432 can move upward and release from the through hole of the extension tube 30. Therefore, the second connection part 430 and the extension tube 30 may be separated from each other. When the external force applied to the release button 431 is removed, the release button 431 can move upward again through its own elasticity. When the external force applied to the release button 431 is removed, the engaging portion 432 may move downward again.

As shown in FIG. 5, the elastic straight tube 450 may form a channel 401 between the inlet 111 and the second connecting portion 430. The elastic straight tube 450 may include an elastic tube 451 and a coil spring 452.

The elastic tube 451 may form a channel 401 therein. The elastic tube 451 may be formed in a cylindrical shape. The elastic tube 451 may be made of soft resin. Therefore, when the first connection part 420 and the second connection part 430 relatively rotate, and when the assembly part 132 and the first connection part 420 relatively rotate, the elastic tube 451 may be elastically deformed.

The coil spring 452 may be connected to the inner surface or the outer surface of the elastic tube 451. The coil spring 452 can maintain the cylindrical shape of the elastic tube 451.

In the compressed state, the coil spring 452 may be fitted between the inlet 111 and the second connection part 430. In each of the inlet 111 and the second connecting portion 430, a raised portion can be formed, and both end portions of the coil spring 452 can be received by the raised portions of the inlet 111 and the second connecting portion 430.

When the first connecting portion 420 and the second connecting portion 430 rotate relatively, and when the assembling portion 132 and the first connecting portion 420 relatively rotate, the difference between the raised portion of the inlet 111 and the raised portion of the second connecting portion 430 can be changed. The distance between.

When the first connection part 420 and the second connection part 430 rotate relatively, and when the assembly part 132 and the first connection part 420 relatively rotate, the elastic tube 451 can be maintained to be in close contact with the inlet 111 and the second through the elasticity of the coil spring 452. The raised part of the connecting portion 430.

FIG. 8 is a perspective view of an assembled state of the assembly housing 130 and the connector 400 of the suction nozzle 10 of FIG. 4. FIG. 9 is an assembled state of the main housing 110, the assembly housing 130, and the connector 400 of the nozzle 10 of FIG. 4 Stereograph.

10 is a partial cross-sectional view of the assembled state of the main housing 110, the assembly housing 130, and the connector 400 of the suction nozzle 10 of FIG. 9.

The insertion part 410 may be formed in a tube shape and has a diameter smaller than that of the first connection part 420. The insertion portion 410 may be coupled to the first connecting portion 420 through bolts. In the first connecting portion 420, a fastening portion (N) in which a bolt is fastened with a screw may be formed. In the insertion part 410, an insertion part (T) into which a bolt is inserted may be formed.

The insertion part 410 may protrude forward from the inside of the first connection part 420. The front surface of the first connection part 420 may form a ring shape around the insertion part 410.

The coupling part 440 may connect the assembly housing 130 and the connector 400 to each other, in such a manner that the assembly housing 130 and the connector 400 rotate around the insertion part 410. The coupling member 440 can restrict the assembly portion 132 and the intermediate portion 133 from moving forward and backward relative to the first connecting portion 420. In other words, the coupling member 440 can restrict the insertion portion 410 and the first connecting portion 420 from moving forward and backward relative to the intermediate portion 133.

After the insertion part 410 is inserted into the fitting part 132, the coupling part 440 may be fitted in the outer surface of the insertion part 410. After that, the elastic straight tube 450 may be inserted into the insertion part 410. Then, the cover part 131 may be assembled in the upper portion of the main housing 110.

When the cover part 131 is fitted in the upper part of the main housing 110, the insertion part 410 may be inserted into the inlet 111. The first connection part 420 may be spaced apart from the inlet 111 toward the direction of the passage 401. It should be understood that "the direction of the passage 401" means "the direction of the central axis of the insertion portion 410".

As shown in FIGS. 7 and 10, the coupling member 440 may include a straight pipe portion 441, a protrusion 442, and a spacing protrusion 443.

The straight pipe portion 441 may be formed in a cylindrical shape. When the coupling part 440 is fitted in the outer surface of the insertion part 410, the inner surface of the straight pipe part 441 may surround the outer surface of the insertion part 410. After that, when the cover part 131 is assembled in the upper part of the main housing 110, the inner surface of the inlet 111 may surround the outer surface of the straight pipe part 441.

The spacing protrusion 443 may protrude from the outer surface of the straight pipe portion 441 in the circumferential direction. The straight pipe portion 441 may be spaced apart from the inner surface of the inlet 111 through the spacing protrusion 443. The spacing protrusion 443 may also be spaced apart from the inner surface of the inlet 111.

When an external force is applied to the connector 400, the spacing protrusion 443 may contact the inner surface of the inlet 111. The contact surface between the spacing protrusion 443 and the inlet 111 may be relatively small compared to the outer surface of the straight pipe portion 441. Therefore, even when the spacing protrusion 443 is in contact with the inner surface of the inlet 111, the housing 130 is assembled The relative rotation with the first connecting portion 420 is still possible.

In the vacuum cleaner of the prior art 1, when the second connection member receives an external force from the first connection member, the second connection member can be deformed in the opposite direction of the first connection member (that is, the outward direction). For this reason, the prior art 1 has the limitation that the rotatably coupled connection members can be easily decoupled by the external force applied to the first connection member.

In the vacuum cleaner of Prior Art 1, when the coupling member 440 is fitted in the outer surface of the insertion part 410, the inner surface of the straight pipe part 441 may surround the outer surface of the insertion part 410. After that, when the cover part 131 is assembled in the upper part of the main housing 110, the inner surface of the inlet 111 may surround the outer surface of the straight pipe part 441.

Therefore, when the straight pipe portion 441 receiving the external force from the insertion portion 410 deforms in the opposite direction of the insertion portion 410 (that is, the outward direction), the inner surface of the inlet 111 can be used as a boundary to prevent the straight pipe portion 441 from being deformed.

That is, even when the insertion portion 410 is deformed by an external force applied to the connector 400, and the external force is thus transmitted to the straight pipe portion 441, the inlet 111 may have rigidity through which the straight pipe portion 441 can be prevented from being deformed.

Therefore, the inlet 111 can prevent the relative deformation of the insertion part 410 and the coupling member 440. Therefore, in the vacuum cleaner 1 of the present invention, even when a strong external force is applied to the connector 400, the fitting part 132 and the first connection part 420 may not be decoupled from each other.

As shown in FIGS. 7 and 10, in either the insertion portion 410 or the straight pipe portion 441, a receiving hole 411 may be formed. In either the insertion portion 410 or the straight pipe portion 441, a receiving portion 441A may be formed. For example, the receiving portion 441A may be formed in the receiving hole 411, and the receiving portion 411 may be formed in the inserting portion 410.

The receiving portion 441A may protrude from the inner surface of the straight pipe portion 441. The protrusion height of the receiving portion 441A inside the straight pipe portion 441 can be reduced later.

When the insertion portion 410 is inserted into the coupling member 440, the receiving portion 441A can be bent outward through the outer surface of the insertion portion 410. When the receiving portion 441A is inserted into the receiving hole 411, the coupling member 440 may be fitted in the outer surface of the insertion portion 410.

The receiving portion 441A may form a surface perpendicular to the direction of the channel 401. Therefore, even when the coupling member 440 is pulled forward, the state in which the receiving portion 441A is received in the receiving hole 411 can be maintained.

In the vacuum cleaner of the prior art 1, the connecting members rotatably connected to each other may Couple with each other by inserting forcefully. Therefore, when the connecting members of the prior art 1 are decoupled from each other for maintenance and other purposes, the area where the connecting members are coupled by forceful insertion is likely to be worn or broken.

In the vacuum cleaner of Prior Art 1, on the contrary, when the receiving portion 441A is pushed outward from the inside of the insertion portion 410, the receiving portion 441A received in the receiving hole 411 can be easily released from the receiving hole 411.

When the coupling part 440 is pulled forward while the receiving part 441A is pushed outward from the inside of the insertion part 410, the insertion part 410 and the coupling part 440 can be easily decoupled from each other. Therefore, the present invention has the advantage that the assembly shell 130 and the first connecting portion 420 can be easily decoupled without causing wear or damage.

As shown in FIGS. 7 and 10, the protruding portion 442 may protrude from the outer surface of the straight pipe portion 441 in the circumferential direction. The protrusion 442 may form a first boundary surface 442A.

The first connecting portion 420 may form a second boundary surface 421. The second boundary surface 421 may be spaced apart from the first boundary surface 442A in the direction of the channel 401.

When the coupling member 440 is assembled in the outer surface of the insertion portion 410, the intermediate portion 133 can be inserted between the first boundary surface 442A and the second boundary surface 421. The first side interface 442A and the second boundary surface 421 can block the movement of the intermediate portion 133 in the direction of the channel 401.

The first side interface 442A and the second boundary surface 421 may form a ring around the central axis of the insertion part 410. The first side interface 442A and the second boundary surface 421 face each other in the direction of the center axis of the insertion portion 410. Therefore, the fitting housing 130 may be fitted in the connector 400 to rotate around the central axis of the insertion part 410.

The protrusion 442 may form a third boundary surface 442B. The third boundary surface 442B may be formed on the outer surface of the protrusion 442 toward the circumferential direction. The third boundary surface 442B may have a constant radius along the circumferential direction of the central axis of the insertion part 410. The first side interface 442A and the third boundary surface 442B may form an angle of about 90 degrees.

The intermediate position 133 may form a fourth boundary surface 133A. The assembling part 132 may be formed in a cylindrical ring shape. The intermediate portion 133 may form a fourth boundary surface 133A along the circumferential direction of the central axis of the assembling portion 132. The second boundary surface 421 and the fourth boundary surface 133A may form an angle of about 90 degrees.

The third boundary surface 442B and the fourth boundary surface 133A face each other in the radial direction of the straight pipe portion 441. When the insertion part 410 moves in the radial direction, the third boundary surface 442B and the fourth boundary surface 133A may be in close contact with each other. Therefore, the third boundary surface 442B and the fourth boundary surface 133A can block the radial movement of the insertion portion 410 relative to the assembly portion 132.

The protrusion 442 may form a fifth boundary surface 442C. The fifth boundary surface 442C may be formed on the outer surface of the protrusion 442 in the circumferential direction.

The fifth boundary surface 442C may have a constant radius along the circumferential direction of the central axis of the insertion part 410. The third boundary surface 442B and the fifth boundary surface 442C may form a stepped portion. The first side interface 442A and the fifth boundary surface 442C may form an angle of about 90 degrees.

On the inner surface of the assembling part 132, a sixth boundary surface 133B may be formed. The inner surface of the assembling part 132 may form a cylindrical ring shape. The fitting portion 132 may form a sixth boundary surface 133B along the circumferential direction of the central axis of the fitting portion 132.

The fourth boundary surface 133A and the sixth boundary surface 133B may form a stepped portion. The second boundary surface 421 and the sixth boundary surface 133B may form an angle of about 90 degrees.

The fifth boundary surface 442C and the sixth boundary surface 133B may face each other toward the radial direction of the straight pipe portion 441. When the insertion part 410 moves in the radial direction, the fifth boundary surface 442C and the sixth boundary surface 133B may be in close contact with each other. Therefore, the fifth boundary surface 442C and the sixth boundary surface 133B can block the radial movement of the insertion portion 410 from the assembly portion 132.

The rear surface of the inlet 111 may form a seventh boundary surface 111A. The seventh boundary surface 111A may form a ring around the central axis of the entrance 111.

The front surface of the protrusion 442 may form an eighth boundary surface 442D. The eighth boundary surface 442D may form a ring shape around the central axis of the straight pipe portion 441. The eighth boundary surface 442D may be spaced apart from the seventh boundary surface 111A in the direction of the channel 401.

When the coupling member 440 is fitted in the outer surface of the insertion part 410, the rear surface of the inlet 111 and the front surface of the protrusion 442 may face each other toward the radial direction of the straight pipe part 441. Therefore, the seventh boundary surface 111A and the eighth boundary surface 442D can block the movement of the main housing 110 and the first connecting portion 420 toward the channel 401.

The actions from the first side interface to the eighth boundary surface can be summarized as follows.

(1) The first boundary surface 442A and the second boundary surface 421 allow relative rotation between the housing 100 and the connector 400 around the central axis of the insertion part 410.

(2) The first boundary surface 442A and the second boundary surface 421 can block the relative movement between the housing 100 and the connector 400 in the direction of the channel 401.

(3) The seventh boundary surface 111A and the eighth boundary surface 442D can block the relative movement between the housing 100 and the connector 400 in the direction of the channel 401.

(4) The third boundary surface 442B and the fourth boundary surface 133A can block the connection between the housing 100 and The relative movement between the devices 400 in the radial direction.

(5) The fifth boundary surface 442C and the sixth boundary surface 133B can block the relative movement between the housing 100 and the connector 400 in the radial direction.

The vacuum cleaner of the prior art 1 has the limitation that when the first connection member rotates, the friction force is concentrated on the contact surface between the first connection member and the second connection member. Concentrated friction can accelerate the wear of components.

In the vacuum cleaner 1 of the present invention, the relative rotation between the housing 100 and the connector 400 can be completed by action (1). The relative movement between the housing 100 and the connector 400 in the direction of the channel 401 can be double-blocked by actions (2) and (3). The relative movement in the radial direction between the housing 100 and the connector 400 can be double-blocked by actions (4) and (5).

That is, when the first connecting portion 420 rotates around the central axis of the inserting portion 410, between the first boundary surface 442A and the second boundary surface 421, between the third boundary surface 442B and the fourth boundary surface 133A, and the fifth boundary surface 133A The frictional force between the boundary surface 442C and the sixth boundary surface 133B, and between the seventh boundary surface 111A and the eighth boundary surface 442D may be dispersed.

Therefore, the vacuum cleaner 1 of the present invention has the advantage that when the first connecting part 420 rotates around the central axis of the insertion part 410, it can prevent the friction force from being concentrated in a specific area, thereby preventing component wear.

FIG. 11 is a partially exploded perspective view of the main housing 110 and the driver 200 of FIG. 5. FIG. 12 is an exploded perspective view of the driver 200 of FIG. 11. FIG. 13 is a side view of the drive 200 of FIG. 11.

The driver 200 can rotate the rotating brush 310. The driver 200 may be coupled to one side of the main housing 110 (hereinafter referred to as "left side surface"). As shown in FIG. 4, the side surface cover 150 can cover the drive 200. The side surface cover 150 may be coupled to the left side surface of the housing 100 through a locking structure such as a hook. In the side surface cover 150, a through hole may be formed for air inflow and outflow.

As shown in FIG. 11, the driver 200 may include a bracket 210, a motor 220, and a transmission unit 230.

The bracket 210 may be coupled to the main housing 110 through bolts. The bracket 210 may block the left side surface of the main housing 110. In the left side surface of the main housing 110, a plurality of fastening parts (N) in which bolts are fastened with screws may be formed. In the bracket 210, a plurality of insertion portions (T) into which bolts are inserted may be formed.

The motor 220 can generate rotational force. The motor 220 may be configured as a brushless direct current (BLDC) motor. The motor 220 may be coupled to the bracket 210. When the bracket 210 is coupled to the main housing 110, the motor 220 can be set It is placed behind the rotating brush 310. The rotation axis of the motor 220 may be aligned with the rotation axis of the rotating brush 310.

As shown in FIGS. 12 and 13, the transmission unit 230 may transmit the rotation movement of the motor 220 to the rotating brush 310. The transmission unit 230 may be assembled in the bracket 210. The transmission unit 230 may include a first belt transmission unit 231 and a second belt transmission unit 232.

The first belt transmission unit 231 may transmit the rotational movement of the motor 220 to the intermediate pulley (R). When the bracket 210 is coupled to the main housing 110, an intermediate pulley (R) may be disposed between the motor 220 and the rotating brush 310. The axis of the intermediate pulley (R) may be aligned with the axis of rotation of the rotating brush 310.

The fixed shaft (A) may be coupled to the bracket 210. The intermediate pulley (R) can be rotatably assembled in the fixed shaft (A) through the bearing (B). The groove may be formed on the fixed shaft (A). The buckle (S) can be fitted in the groove to avoid the deviation of the intermediate pulley (R).

The intermediate pulley (R) may include a first intermediate pulley 231B and a second intermediate pulley 232B. The first intermediate pulley 231B and the second intermediate pulley 232B can rotate at the same time. The first intermediate pulley 231B and the second intermediate pulley 232B may be integrally manufactured.

On the outer surfaces of the first intermediate pulley 231B and the second intermediate pulley 232B, equidistant grooves may be formed, as on a gear. That is, on the outer surfaces of the first intermediate pulley 231B and the second intermediate pulley 232B, gear teeth may be formed as on a gear. The number of gear teeth of the first intermediate pulley 231B may be greater than the number of gear teeth of the second intermediate pulley 232B.

As shown in FIGS. 12 and 13, the first belt transmission unit 231 may include a driving pulley 231A, a first intermediate pulley 231B, and a first belt 231C.

The first belt transmission unit 231 may be spaced apart from the rotating fur brush 310. That is, the driving pulley 231A, the first intermediate pulley 231B, and the first belt 231C may be disposed on the opposite side of the rotating brush 310 with respect to the bracket 210.

The driving pulley 231A may be coupled to the axis of the motor 220. On the outer surface of the driving pulley 231A, gear teeth may be formed, as on a gear. The number of gear teeth of the first intermediate pulley 231B may be greater than the number of gear teeth of the driving pulley 231A.

The first belt 231C can wind the driving pulley 231A and the first intermediate pulley 231B. The first belt 231C may wind the driving pulley 231A and the first intermediate pulley 231B in an open belt manner. Therefore, the first belt 231C can transmit the rotational movement of the driving pulley 231A to the first intermediate pulley 231B in the same rotation direction.

The first belt 231C may be provided as a timing belt. Therefore, the first belt 231C can be accurate The rotational movement of the driving pulley 231A is transmitted to the first intermediate pulley 231B.

As described above, the number of gear teeth of the first intermediate pulley 231B may be greater than the number of gear teeth of the driving pulley 231A. Therefore, the moment of the first intermediate pulley 231B may be greater than the moment of the driving pulley 231A. Also, the rotation speed of the first intermediate pulley 231B may be slower than the rotation speed of the driving pulley 231A.

The second belt transmission unit 232 may transmit the rotational movement of the intermediate pulley (R) to the rotating brush 310. The second belt transmission unit 232 may include a driven pulley 232A, a second intermediate pulley 232B, a second belt 232C, and a first shaft member 232D.

The second belt transmission unit 232 may be spaced apart from the rotating fur brush 310. That is, the driven pulley 232A, the second intermediate pulley 232B, and the second belt 232C may be disposed on the opposite side of the rotating brush 310 with respect to the bracket 210.

The first shaft member 232D may be inserted into the rotating fur brush 310. The diameter of the first shaft member 232D may not exceed the range of the diameter of the rotating brush 310, regardless of the capacity of the motor 220.

The driven pulley 232A may be rotatably assembled in the bracket 210. A through hole may be formed in the bracket 210. The bearing (B) can be fitted in the through hole. The shaft of the driven pulley 232A may be rotatably coupled to the bearing (B). The shaft of the driven pulley 232A can pass through the bracket 210. The shaft of the driven pulley 232A may be aligned with the rotation axis of the rotating brush 310.

The first shaft member 232D may transmit the rotational movement of the driven pulley 232A to the rotating brush 310. The second shaft member 313 may be provided at one end of the rotating fur brush 310.

Next, in order to easily understand the present invention, the direction of the rotation axis of the rotating brush 310 will be referred to as the "axis direction".

The first shaft member 232D may be inserted into the second shaft member 313 to transmit the rotational movement to the second shaft member 313. The rotation axis of the first shaft member 232D and the rotation axis of the rotating brush 310 may be located on the same line.

The first shaft member 232D may be coupled to the shaft of the driven pulley 232A from the opposite side of the driven pulley 232A. When the bracket 210 is coupled to the main housing 110, the first shaft member 232D may be disposed inside the main housing 110. As shown in FIG. 11, in the left side surface of the main housing 110, a through hole 110H may be formed, and the first shaft member 232D may be inserted into the through hole.

On the outer surface of the driven pulley 232A, gear teeth may be formed, as on a gear. The number of gear teeth of the driven pulley 232A may be greater than the number of gear teeth of the second intermediate pulley 232B.

The second belt 232C can wind the driven pulley 232A and the second intermediate pulley 232B. second The belt 232C can wind the driven pulley 232A and the second intermediate pulley 232B in an open belt manner.

The second belt 232C may transmit the rotation movement of the second intermediate pulley 232B to the driven pulley 232A in the same rotation direction. Therefore, the rotation direction of the motor 220 is the same as the rotation direction of the first shaft member 232D.

The second belt 232C may be set as a timing belt. Therefore, the second belt 232C can accurately transmit the rotational movement of the second intermediate pulley 232B to the driven pulley 232A.

As described above, the number of gear teeth of the driven pulley 232A may be greater than the number of gear teeth of the second intermediate pulley 232B. Therefore, the moment of the driven pulley 232A may be greater than the moment of the second intermediate pulley 232B. In addition, the rotation speed of the driven pulley 232A may be less than the rotation speed of the second intermediate pulley 232B.

Therefore, the rotation speed of the first shaft member 232D may be less than the rotation speed of the motor 220, and the torque of the first shaft member 232D may be greater than the torque of the motor 220. The rotating brush 310 can be rotated with a relatively high torque to move the dust and debris on the floor to the suction space 101.

Fig. 14 is a bottom view of the suction nozzle 10 of Fig. 2. Fig. 15 is a cross-sectional view of the suction nozzle 10 of Fig. 14 cut along the line A to A'.

As shown in FIGS. 13 and 14, when the bracket 210 is coupled to the main housing 110, the motor 220 may be disposed behind the rotating brush 310. The rotation movement of the motor 220 can be transmitted to the rotating brush 310 spaced apart from the motor 220 through the first belt transmission unit 231 and the second belt transmission unit 232.

The position of the intermediate pulley (R) can be determined according to the distance between the motor 220 and the rotating brush 310. In addition, the length of the first belt 231C may be determined according to the distance between the driving pulley 231A and the first intermediate pulley 231B, and the diameter of the driving pulley 231A and the first intermediate pulley 231B. In addition, the length of the second belt 232C can be determined according to the distance between the driven pulley 232A and the second intermediate pulley 232B, and the diameter of the driven pulley 232A and the second intermediate pulley 232B.

The components of the vacuum cleaner 1 can have various specifications according to the purpose of the vacuum cleaner 1. The capacity of the motor 220 and the diameter and material of the rotating brush 310 can also be determined according to the use of the vacuum cleaner 1 as appropriate.

For example, compared with the motors and rotating brushes of household vacuum cleaners, commercial vacuum cleaners may include motors with larger capacity and rotating brushes with longer diameters. The material of the rotating brush can be determined from metal or synthetic resin according to the purpose of the vacuum cleaner.

However, for the vacuum cleaner of Prior Art 1, when selecting a motor, the diameter of the brush must be considered. Therefore, the prior art 1 has the limitation that the capacity of the motor cannot be increased to the required level, etc. class.

At the same time, for household vacuum cleaners, a suction nozzle with a relatively low height is more advantageous in terms of practicability. This is because a suction nozzle with a relatively low height can easily enter a space with a relatively low height.

However, in the prior art 1, when determining the diameter of the rotating brush, the size and shape of the motor must be considered. Therefore, the prior art 1 has limitations, and the diameter of the rotating brush cannot be reduced to the required level.

In the vacuum cleaner 1 of the present invention, the driver 200 may be provided outside the rotating brush 310. Therefore, the present invention has the advantage that regardless of the size and shape of the motor 220, the diameter of the rotating brush 310 can be determined.

In addition, the present invention has the advantage that regardless of the diameter of the rotating brush 310, the capacity of the motor 220 can be determined.

When the suction nozzle 10 moves back and forth, inertia can act on the suction nozzle 10 in the moving direction. In the vacuum cleaner of Prior Art 1, the center of gravity of the suction nozzle is concentrated on the front side of the suction nozzle. Therefore, when the suction nozzle moves forward, the back of the suction nozzle will be lifted by inertia.

In addition, when the suction nozzle is tilted forward, the friction between the rotating cleaning unit and the floor will increase. The excess friction between the rotating cleaning unit and the floor may damage the floor.

In the vacuum cleaner 1 of the present invention, the driver 200 may be arranged behind the rotating brush 310. Therefore, compared with the center of gravity of the suction nozzle of the vacuum cleaner of the prior art 1, the center of gravity of the suction nozzle 10 of the present invention can be located further rearward. Therefore, in the vacuum cleaner 1 of the present invention, when the suction nozzle 10 moves back and forth, the possibility of the suction nozzle 10 tilting forward is small.

When the suction nozzle 10 is relatively heavy, the practicality of the vacuum cleaner 1 may decrease. In the case of an upright vacuum cleaner, the rollers and rotating brushes in the housing will rub against the floor. Therefore, users with low strength, such as the elderly or children, may not be able to smoothly carry the upright vacuum cleaner.

Therefore, it is necessary to reduce the weight of the nozzle of an upright vacuum cleaner. However, for traditional vacuum cleaners, two-stage planetary gears composed of multiple components are generally used.

In the vacuum cleaner 1 of the present invention, the rotation movement of the motor 220 can be transmitted to the rotating brush 310 through the first belt transmission unit 231 and the second belt transmission unit 232. The belt transmission unit transmits rotational motion through a simple pulley structure. Therefore, compared with a two-stage planetary gear, the transmission unit 230 may have the advantage that the number of components and the weight of the transmission unit 230 are greatly reduced.

As shown in Figure 15, the assembly shell 130 together with the main shell 110, the bottom shell 120 and the bracket 210 An independent space 102 can be formed. The independent space 102 is a space independent of the suction space 101. The independent space 102 may be provided behind the rotating brush 310. The dust and debris sucked into the space 101 may not enter the independent space 102.

When the bracket 210 is coupled to the main housing 110, the motor 220 may be disposed in the independent space 102. In addition, the first belt transmission unit 231 and the second belt transmission unit 232 can be independent of the suction space 101 through the bracket 210. Therefore, even when the drive 200 is not inserted into the rotating brush 310, the contamination of the drive 200 caused by dust and debris can be prevented.

When the rotating brush 310 rubs the floor, the temperature of the rotating brush 310 may increase. In the vacuum cleaner of the prior art 1, the motor and the gear unit may be provided in the rotating brush. Therefore, the vacuum cleaner of the prior art 1 has the limitation that the heat dissipation of its motor and gear unit is relatively low. This increase in temperature of the motor and gear unit will directly cause performance degradation and failure of the motor and gear unit.

In the vacuum cleaner 1 of the present invention, the driver 200 may be spaced apart from the rotating brush 310. Specifically, the motor 220, pulleys, and belts that generate heat energy may be disposed in an independent space 102 that is independent of the rotating brush 310. The vacuum cleaner 1 of the present invention has the advantage that the heat energy of the motor 220, the pulley and the belt can all be quickly released through the bracket 210 and the housing 100.

FIG. 16 is a perspective view of the brush module 300 of FIG. 4. FIG. 17 is an exploded perspective view of the brush module 300 of FIG. 16. FIG. 18 is a perspective view of the nozzle module 10 of FIG. 2, in which the brush module 300 is separated.

As shown in FIGS. 16 and 17, the brush module 300 may include a rotating brush 310 and a detachable cover 320.

The rotating brush 310 can push dust and debris on the floor to the back of the rotating brush 310. The rotating brush 310 may include a body 311, a brush member 312, a second shaft member 313, and a third shaft member 314.

The body 311 may form a frame of the rotating brush 310. The body 311 may be formed in a hollow cylindrical shape. The central axis of the main body 311 can be used as the central axis of the rotating brush 310. The body 311 may have rotational inertia consistent with its circumferential direction. The body 311 may be made of synthetic resin or metal.

The brush member 312 may be attached to the outer surface of the body 311. The brush member 312 may include a plurality of bristles. When the body 311 rotates, a plurality of bristles can sweep dust and debris on the floor into the air. The plurality of bristles may include fiber bristles and metal bristles.

Fiber bristles and metal bristles can be randomly arranged on the outer surface of the body 311. Fiber bristles and metal bristles may be directly attached to the outer surface of the body 311. Although not shown in the figure, the fiber layer can be attached Connected to the outer surface of the body 311. Then, fiber bristles and metal bristles can be attached to the fiber layer.

The fiber bristles may be made of synthetic resin such as nylon. The metal bristles may contain conductive materials. Metal bristles can be manufactured through paint bristles made of synthetic resin and conductive materials.

The static electricity generated in the fiber bristles can be discharged to the ground or removed through the metal bristles. In this way, static electricity can be prevented from being transmitted to the user's body.

As shown in FIGS. 16 and 17, the second shaft member 313 may receive the rotational movement of the first shaft member 232D. The second shaft member 313 may be disposed in the opening on one side of the body 311. The second shaft member 313 can be inserted into the opening on one side of the body 311.

The insertion groove 313H may be formed on the outer surface of the second shaft member 313. The protrusion 311A may be formed along the length direction of the inner periphery of the body 311. When the second shaft member 313 is inserted into the opening of the body 311, the protrusion 311A may be inserted into the insertion groove 313H. The protrusion 311A can block the relative rotation of the second shaft member 313.

In the second shaft member 313, a space into which the first shaft member 232D is inserted may be formed. When the rotating fur brush 310 moves in its axial direction, the first shaft member 232D may be inserted into the second shaft member 313.

The first shaft member 232D and the second shaft member 313 may be engaged with each other on a plurality of contact surfaces. When the first shaft member 232D and the second shaft member 313 are engaged with each other, the rotation axis of the first shaft member 232D and the rotation axis of the second shaft member 313 may be located on the same line.

The rotational movement of the first shaft member 232D can be transmitted to the second shaft member 313 through the contact surface. In the case where the first shaft member 232D and the second shaft member 313 are engaged with each other, the rotation axis of the rotating brush 310 and the rotation axis of the first shaft member 232D may be located on the same line.

As shown in FIGS. 16 and 17, the third shaft member 314 may connect the body 311 to the detachable cover 320, and in this manner, the body 311 rotates. The third shaft member 314 may be disposed in the opening on the other side of the body 311. The third shaft member 314 can be inserted into the opening on the other side of the body 311.

The insertion groove 314H may be formed on the outer surface of the third shaft member 314. The protrusion 311A may be formed along the length direction of the inner periphery of the body 311. When the third shaft member 314 is inserted into the opening of the body 311, the protrusion 311A may be inserted into the insertion groove 314H. The protrusion 311A can block the relative rotation of the third shaft member 314.

The bearing (B) may be assembled in the third shaft member 314. The fixed shaft (A) may be provided in the detachable cover 320. The bearing (B) can support the fixed shaft (A) in such a way that the fixed shaft (A) rotates. The groove may be formed on the fixed shaft (A). The buckle (S) can be fitted in the groove to prevent the first The triaxial member 314 is separated from the fixed shaft (A).

The detachable cover 320 is rotatable about the rotation axis of the rotating brush 310 to be detachably coupled to the housing 100.

FIG. 19 is a perspective view of the nozzle module 10 of FIG. 2, in which the housing 100 and the detachable cover 320 are coupled. FIG. 20 is a perspective view of the nozzle module 10 of FIG. 2, in which the housing 100 and the detachable cover 320 are decoupled.

Next, for easy understanding of the present invention, the state in which the detachable cover 320 is coupled to the housing 100 will be referred to as a “coupled state”. Moreover, the state in which the detachable cover 320 decouples the housing 100 by rotating around the rotation axis of the rotating brush 310 will be referred to as a "decoupling state".

In the decoupling state of FIG. 20, when the detachable cover 320 is pulled axially, the brush module 300 can be separated from the housing 100 as in FIG. 18.

Next, for easy understanding of the present invention, the rotation direction in which the detachable cover 320 is coupled to the housing 100 will be referred to as the “first rotation direction”. The rotation direction in which the detachable cover 320 is decoupled from the housing 100 will be referred to as the “second rotation direction”.

In the decoupling state of FIG. 20, when the detachable cover 320 is rotated toward the first rotation direction, the detachable cover 320 may be coupled with the housing 100 as in FIG. 19.

FIG. 21 is a perspective view of the nozzle module 10 of FIG. 18, in which the rotating brush 310 is not shown. FIG. 22 is a perspective view of the nozzle module 10 of FIG. 21, in which the pressing button 141 is separated. FIG. 23 is a perspective view of the detachable cover 320 of FIG. 21.

As shown in Figures 21 and 22, one side of the main housing 110 (hereinafter referred to as the "right side surface") has a guide rail 112, a plurality of first walls 112A, a plurality of second walls 112B, and a second protrusion 113 .

The guide rail 112 may be formed on the right side surface of the main housing 110. The guide rail 112 may be formed in the circumferential direction of the rotation axis of the first shaft member 232D.

The outer surface of the guide rail 112 may guide the rotation of the first protrusion 324 about the rotation axis of the first shaft member 232D. The first protruding portion 324 may be guided to the outer surface of the guide rail 112 and rotate toward the first rotation direction and the second rotation direction.

The first wall 112A may be formed on the outer surface of the guide rail 112. The first wall 112A may protrude from the outer surface of the guide rail 112. The first protruding part 324 can rotate in a first rotation direction to enter between the first wall 112A and the main housing 110. The first wall 112A can block the axial movement of the first protruding portion 324.

The second wall 112B may be formed on the outer surface of the guide rail 112. The second wall 112B It may protrude from the outer surface of the guide rail 112. In the coupled state, the second wall 112B can block the rotation of the first protrusion 324 in the first rotation direction.

The second protruding part 113 may be formed on the right side surface of the main housing 110. In the detachable cover 320, the guide groove 325 may be formed along a substantially circumferential direction of the fixed shaft (A).

The inner surface of the guide groove 325 may guide the rotation of the second protruding part 113 about the rotation axis of the rotating brush 310. In the coupled state and the decoupled state, the second protruding portion 113 may be maintained in a state of being inserted into the guide groove 325.

As shown in FIGS. 21 and 22, the pressing button 141 may be assembled in the support housing 140. Pressing the button 141 can selectively block the rotation of the detachable cover 320. The pressing button 141 may include a button part 141A, an elastic member 141B, a first blocking part 141C, and a second blocking part 141D.

The button part 141A may form a surface on which the user pushes. The first fitting groove 141H1 into which the button part 141A is inserted may be formed in the support housing 140.

A pair of shaft part 141E may be formed in the button part 141A. The pair of shaft parts 141E may be formed on both side surfaces of the button part 141A. A pair of shaft member grooves 141H4 may be formed on the inner surface of the first fitting groove 141H1. The pair of shaft grooves 141H4 may be formed on the inner surfaces of both sides of the first assembling groove 141H1.

The shaft part 141E can be inserted into the shaft groove 141H4. The button part 141A is rotatable around the shaft part 141E inserted into the shaft groove 141H4.

The first blocking part 141C may extend from the button part 141A. In the coupled state, the first blocking part 141C may block the rotation of the third protruding part 326.

The second fitting groove 141H2 may be formed in the support housing 140. A portion of the first blocking portion 141C may be inserted into the second fitting groove 141H2. The first blocking portion 141C is rotatable around the shaft portion 141E in the second assembly groove 141H2.

When the user pushes the button part 141A, the pressing button 141 can rotate around the shaft part 141E. Therefore, the first blocking portion 141C may deviate from the rotation route of the third protruding portion 326.

The elastic member 141B may be inserted between the button part 141A and the housing 100. The elastic member 141B can form a force between the shaft part 141E and the first blocking part 141C to push the button part 141A outward.

Therefore, when the external force applied to the button part 141A is removed, the first blocking part 141C may return to the rotation route of the third protruding part 326. In the support housing 140, a third fitting groove 141H3 into which the elastic member 141B is inserted may be formed.

The second blocking part 141D may extend from the button part 141A. In the coupled state, the second resistance The stopper 141D can block the axial movement of the fourth protruding portion 327. In the coupled state, the axial movement of the fourth protruding portion 327 may be blocked by the second blocking portion 141D.

The detachable cover 320 may rotatably support the rotating brush 310. The detachable cover 320 is rotatable about the rotation axis of the rotating brush 310 to be detachably coupled to the housing 100.

As shown in FIGS. 21 and 23, the detachable cover 320 may include a cover body 321, a hub 322, a protruding rib 323, a first protruding portion 324, a third protruding structure 326, and a fourth protruding portion 327.

In the coupled state, the cover body 321 can cover the right side surface of the housing 100. A through hole may be formed in the cover body 321 for the inflow and outflow of air.

The contour of the edge portion of the cover body 321 may be similar to the contour of the right side surface of the housing 100. The edge portion of the cover body 321 may protrude toward the edge of the right side surface of the housing 100. In the coupled state, the edge portion of the cover body 321 may be in close contact with the edge of the right side surface of the housing 100.

The hub 322 may be a part that couples and fixes the shaft (A). When the detachable cover 320 is injection molded, the fixed shaft (A) can be inserted into the mold. The hub 322 may be formed on the inner surface of the detachable cover 320. The inner surface of the detachable cover 320 may be a surface facing the housing 100.

The protruding rib 323 may be a portion that allows the first protruding portion 324 and the inner surface of the detachable cover 320 to be spaced apart by a certain distance. The protruding rib 323 may be formed on the inner surface of the detachable cover 320. The protruding rib 323 may be formed in the circumferential direction of the hub 322.

A plurality of first protruding parts 324 may be formed in the protruding ribs 323. The first protruding portion 324 may protrude from the protruding rib 323 toward the hub 322. The first protrusion structures 324 may be spaced apart from each other toward the circumferential direction of the fixed shaft (A).

The first protruding portion 324 may be spaced apart from the inner surface of the detachable cover 320 by a certain distance through the protruding rib 323. The first protruding portion 324 may be guided to the outer surface of the guide rail 112 and rotate toward the first rotation direction and the second rotation direction.

The third protruding part 326 may be formed on the edge of the inner surface of the detachable cover 320. When the detachable cover 320 is detachably coupled to the housing 100, the third protruding portion 326 may be received by the first blocking portion 141C. Compared with the first protruding portion 324, the third protruding portion 326 can be spaced farther away from the fixed shaft (A).

The third protruding portion 326 may form a receiving surface 326B along the inclined surface 326A. When the detachable cover 320 rotates around the fixed shaft (A), the first blocking part 141C may interfere with the rotation of the third protrusion part 326.

When the detachable cover 320 rotates in the first rotation direction, the inclined surface 326A can form a gentle When the inclination angle is, the inclination angle can push the first blocking portion toward the central axis of the rotating brush 310. The first blocking portion 141C may only be pushed in the central axial direction. Therefore, when the detachable cover 320 rotates in the first rotation direction, the first blocking portion 141C can be pushed by the receiving surface 326B.

When the detachable cover 320 rotates in the second rotation direction in the coupled state, the receiving surface 326B may form a surface that pushes the first blocking portion 141C in a direction approximately perpendicular to the central axis. The first blocking portion 141C may only be pushed in the central axial direction. Therefore, when the detachable cover 320 is rotated toward the second rotation direction in the coupled state, the first blocking portion 141C may not be pushed.

In order to rotate the detachable cover 320 toward the second rotation direction in the coupled state, the user should push the first blocking portion 141C. In this way, the first blocking portion 141C deviates from the rotation path of the third protruding portion 326.

The fourth protruding part 327 may be formed on the edge of the inner surface of the detachable cover 320. The fourth protruding part 327 may be arranged in front of the third protruding part 326 in the first rotation direction. In the coupled state, the axial movement of the fourth protruding portion 327 may be blocked by the second blocking portion 141D. In the coupled state, the rotation of the fourth protrusion part 327 toward the first rotation direction may be blocked by the support housing 140.

Fig. 24 is a side view of the suction nozzle 10 of Fig. 20. FIG. 25 is a side view of the suction nozzle 10 of FIG. 19, in which the pressing button 141 is pressed. Fig. 26 is a side view of the suction nozzle 10 of Fig. 19.

The process of assembling the brush module 300 in the housing 100 is as follows.

First, push the brush module 300 in the axial direction to insert the first shaft member 232D into the second shaft member 313. When the first shaft member 232D is inserted into the second shaft member 313, the detachable cover 320 may be in a state of decoupling the housing 100, that is, the decoupling state described in detail above.

As shown in FIG. 24, in the decoupled state, the protruding rib 323 may surround the guide rail 112. In the decoupled state, the second protruding portion 113 can be inserted into the guide groove 325.

Then, the user can rotate the detachable cover 320 toward the first rotation direction. Then, the first protruding portion 324 may be guided to the outer surface of the guide rail 112 to rotate toward the first rotation direction. The second protruding part 113 can be centered on the rotation axis of the rotating brush 310 and move inside the guide groove 325.

As shown in FIG. 25, during the rotation of the detachable cover 320 in the first rotation direction, the third protruding portion 326 can penetrate the inclined surface 326A to make the first blocking portion 141C deviate from the rotation route, and then the third protruding portion 326 can face The first rotation direction continues to rotate.

As shown in FIG. 26, when the fourth protruding portion 327 is blocked by the support housing 140, the rotation of the detachable cover 320 in the first rotation direction can be completed. In this state, the detachable cover 320 can be in coupling The state of the housing 100 is the coupling state described in detail above.

In the coupled state, the third protruding portion 326 may be blocked by the first blocking portion 141C, and the first blocking portion 141C blocks the rotation of the third protruding portion 326 toward the second rotation direction. In the coupled state, the axial movement of the fourth protruding portion 327 may be blocked by the second blocking portion 141D.

The first wall 112A can block the axial movement of the first protruding portion 324. The second wall 112B can block the rotation of the first protrusion 324 in the first rotation direction.

The process of separating the brush module 300 from the housing 100 is as follows.

As shown in FIG. 25, the user can first press the push button 141. When the user presses the button 141, the first blocking portion 141C may deviate from the rotation route of the third protrusion 326.

The user can rotate the detachable cover 320 in the second rotation direction. Then, the third protruding portion 326 may surround the fixed shaft (A) in the second rotation direction to be spaced apart from the first blocking portion 141C.

The second protruding part 113 can be centered on the rotation axis of the rotating brush 310 and move inside the guide groove 325.

As shown in FIG. 24, the first protrusion 324 may be guided to the outer surface of the guide rail 112 to rotate toward the second rotation direction. The first protruding portion 324 can rotate in the second rotation direction to deviate from between the main housing 110 and the first wall 112A. In this state, the detachable cover 320 can be in a decoupled state from the housing 100, that is, the decoupled state described in detail above.

In the vacuum cleaner of the prior art 1, the coupling force between the side surface cover and the main body can be generated through a locking structure such as a hook. The locking structure such as a hook is a relatively simple structure. However, in the locked structure, when the direction of the suction nozzle is changed, it is difficult to stably support the axial force applied to the rotary cleaning unit.

In the vacuum cleaner 1 of the present invention, when the detachable cover 320 is rotated in the second rotation direction while pressing the push button 141, the housing 100 and the detachable cover 320 can be easily decoupled. In addition, in the decoupling state, when the detachable cover 320 rotates in the first rotation direction, a coupling force may be generated between the housing 100 and the detachable cover 320.

Moreover, in the coupled state, the first wall 112A can block the axial movement of the first protruding portion 324. The first wall bodies 112A may be spaced apart from each other in the circumferential direction of the fixed shaft (A).

When the direction of the suction nozzle 10 is changed, the first wall 112A arranged along the circumferential direction of the fixed shaft (A) can disperse and support the axial force applied to the rotating brush 310.

The axial movement of the fourth protruding portion 327 may be blocked by the second blocking portion 141D. in addition, In the coupled state, the second wall 112B can block the rotation of the first protrusion 324 in the first rotation direction.

The third protruding portion 326 can be blocked by the first blocking portion 141C, and the first blocking portion 141C can also block the rotation of the third protruding portion 326 in the second rotation direction. The rotation of the fourth protruding portion 327 can be blocked by the support housing 140, and the support housing 140 can also block the rotation of the fourth protruding portion 327 in the first rotation direction.

That is, without pressing the push button 141, the detachable cover 320 cannot push the detachable cover 320 in the axial direction or rotate around the fixed shaft (A). The vacuum cleaner 1 of the present invention can form a powerful coupling structure, in which the housing 100 and the detachable cover 320 cannot be easily decoupled by external force without pressing the button 141.

FIG. 27 is a perspective view of the driver 200 of the brush module 300 and the nozzle module 10 of FIG. 19. FIG. 28 is a side view of the drive 200 of FIG. 27. FIG. 29 is a perspective view of the first shaft member 232D of FIG. 28.

Next, in order to easily understand the present invention, the axial direction in which the rotating brush 310 moves so that the first shaft member 232D is inserted into the second shaft member 313 will be referred to as the "first axial direction". Also, the direction opposite to the first axial direction will be referred to as the "second axial direction".

The first shaft member 232D may transmit the rotational movement to the second shaft member 313. In the second shaft member 313, a space into which the first shaft member 232D is inserted may be formed.

When the rotating brush 310 moves toward the first axial direction, the first shaft member 232D may be inserted into the second shaft member 313. When the first shaft member 232D is inserted into the second shaft member 313, the first shaft member 232D and the second shaft member 313 may be engaged with each other to contact each other on a plurality of contact surfaces.

The rotational movement of the first shaft member 232D can be transmitted to the second shaft member 313 through the contact surface. In the case where the first shaft member 232D and the second shaft member 313 are engaged with each other, the rotation axis of the rotating brush 310 and the rotation axis of the first shaft member 232D may be located on the same line.

The driver of the vacuum cleaner of the prior art 1 is coupled to the rotary cleaning unit in the vacuum cleaner through a fixed member. Therefore, it is difficult for the user to disassemble and reassemble the driver and the rotary cleaning unit in the vacuum cleaner of the prior art 1.

In the vacuum cleaner 1 of the present invention, when the push button 141 is pressed to realize the decoupling state, the detachable cover 320 rotates, and the engagement between the first shaft member 232D and the second shaft member 313 can be released. Therefore, the user can easily decouple the rotating brush 310 and the driver 200 of the vacuum cleaner 1 of the present invention.

As shown in FIGS. 28 and 29, the first shaft member 232D may include a hub 232DA and a plurality of A first transmission unit 232DB.

The hub 232DA may be a part coupled with the shaft of the driven pulley 232A (hereinafter referred to as the pulley shaft). The first shaft member 232D is rotatable around the hub 232DA.

The first transmission parts 232DB may be axisymmetric to each other about the pulley shaft (PA). The number of the first transmission part 232DB may be determined according to the situation. For example, the number of the first transmission part 232DB may be four.

A single first transfer part 232DB can form three surfaces. The single first transfer part 232DB may form the first surface 232D1, the third surface 232D2, and the fifth surface 232D3.

The first surface 232D1 of the first transmission portion 232DB may extend from the side surface of the hub 232DA toward the substantially radial direction of the pulley shaft (PA). The first surface 232D1 of the first transfer part 232DB may be a surface that transfers the rotational movement of the first shaft member 232D to the second shaft member 313. The first surface 232D1 may form a relatively small angle with the radial direction of the pulley shaft (PA).

The first surface 232D1 may form a spiral around the pulley shaft (PA). The first surface 232D1 may be disposed toward the first axial direction along the rotation direction of the first shaft member 232D. The first surfaces 232D1 may be axisymmetric to each other around the hub 232DA.

The surface area of the first surface 232D1 may gradually decrease toward the second axial direction. The first surface 232D1 may be gradually disposed close to the rotation axis of the rotating brush 310 toward the second axial direction.

The third surface 232D2 of the first transmission portion 232DB may extend from the side surface of the hub 232DA toward the substantially radial direction of the pulley shaft (PA). The third surface 232D2 may form a relatively small angle with the radial direction of the pulley shaft (PA).

The third surface 232D2 may be a surface that receives the rotational inertia of the rotating brush 310. Rotational inertia refers to the characteristic that a rotating object maintains its consistent rotational motion.

The second shaft member 313 may receive the rotational force of the motor 220 through the first shaft member 232D. However, if the rotation speed of the second shaft member 313 is greater than the rotation speed of the first shaft member 232D, the rotation inertia of the rotating brush 310 may be transmitted to the first shaft member 232D.

That is, after the operation of the driver 200 stops, the rotational inertia of the rotating fur brush 310 may be transmitted to the first shaft member 232D through the second shaft member 313 until the rotating fur brush 310 stops rotating.

Alternatively, if the rotation speed of the rotating brush 310 is adjusted, the rotation inertia of the rotating brush 310 can be transmitted to the first shaft member 232D through the second shaft member 313, and the rotation speed of the motor 220 will be reduced in the process.

The third surface 232D2 may form a plane aligned with the axial direction of the rotating brush 310. The third surfaces 232D2 may be axisymmetric to each other about the pulley axis (PA).

The surface area of the third surface 232D2 may gradually decrease toward the second axial direction. The third surface 232D2 may be gradually disposed close to the rotation axis of the rotating brush 310 toward the second axial direction.

When the first shaft member 232D is inserted into the second shaft member 313, the single second transfer part 313B may be inserted between the first surface 232D1 and the third surface 232D2 adjacent to each other.

The fifth surface 232D3 may be a surface connecting the first surface 232D1 and the third surface 232D2. The fifth surface 232D3 may connect the first surface 232D1 and the third surface 232D2 in the circumferential direction of the pulley shaft (PA). The fifth surface 232D3 of the first transfer part 232DB may be axisymmetric to each other about the pulley axis (PA).

The surface area of the fifth surface 232D3 may gradually decrease toward the second axial direction. The fifth surface 232D3 may be gradually disposed close to the rotation axis of the rotating brush 310 toward the second axial direction.

FIG. 30 is a side view of the brush module 300 of FIG. 27. FIG. 31 is a partial perspective view of the second shaft member 313 of FIG. 30.

As shown in FIGS. 30 and 31, the second shaft member 313 may include a shaft body 313A and a plurality of second conveying parts 313B.

The shaft 313A can be inserted into the opening on one side of the main body 311. The insertion groove 313H may be formed on the outer surface of the shaft body 313A. The protrusion 311A may be formed along the length direction of the inner periphery of the body 311.

When the shaft 313A is inserted into the opening of the body 311, the protrusion 311A can be inserted into the insertion groove 313H. The protrusion 311A can block the relative rotation of the shaft 313A.

The second transfer parts 313B may be axisymmetric to each other about the pulley shaft (PA). When the first shaft member 232D is inserted into the second shaft member 313, the first shaft member 232D and the second shaft member 313 may be engaged with each other to contact each other on a plurality of contact surfaces. Therefore, the number of second transfer parts 313B may be equal to the number of first transfer parts 232DB.

A single second transfer part 313B may form three surfaces. The single second transfer part 313B may form the second surface 313B1, the fourth surface 313B2, and the seventh surface 313B3. The shaft 313A may form a sixth surface 313A1.

The second surface 313B1 of the second transfer portion 313B may extend from the inner surface of the shaft body 313A toward the substantially radial direction of the pulley shaft (PA). The second surface 313B1 may form a relatively small angle with the radial direction of the pulley shaft (PA).

The second surface 313B1 may form a spiral around the pulley shaft (PA). Second surface 313B1 It may be disposed toward the first axial direction along the rotation direction of the first shaft member 232D.

The second surfaces 313B1 may be axisymmetric to each other around the shaft 313A. The second surface 313B1 may be gradually disposed close to the rotation axis of the rotating brush 310 toward the second axial direction.

FIG. 32 is a cross-sectional view of the nozzle module 10 of FIG. 19. Fig. 33 is a cross-sectional view of the nozzle module 10 of Fig. 32 cut along the line B to B'. Fig. 34 is a cross-sectional view of the nozzle module 10 of Fig. 32 cut along the line C to C'. 35 is a cross-sectional view of the nozzle module 10 of FIG. 32 cut along the line D to D'.

The second surface 313B1 may be a surface that receives the rotational force of the first shaft member 232D. When the first shaft member 232D is inserted into the second shaft member 313, the second surface 313B1 and the first surface 232D1 may spirally form a first contact surface along the axial direction of the rotating brush. On the first contact surface forming the spiral, the rotational force of the first shaft member 232D can be transmitted to the second shaft member 313.

The first contact surfaces may be axisymmetric to each other about the rotation axis of the rotating brush 310. The first contact surface may be disposed along the rotation direction of the first shaft member 232D toward the first axial direction.

Fig. 36 is a graph showing the force acting on the first contact surface (C1). FIG. 37 is a graph showing the force acting on the second surface 313B1.

Through the first contact surface (C1), the rotational force (F) of the first shaft member 232D applied to the second surface 313B1 can be divided into a force parallel to the first contact surface (C1) (F2; hereinafter referred to as "friction component" "), and the force in the normal direction of the first contact surface (C1) (F1; hereinafter referred to as "force").

The first surface 232D1 and the second surface 313B1 may be smooth surfaces. That is, the friction coefficient of the first contact surface (C1) can be relatively very small.

Therefore, it can be assumed that the friction component (F2) can be very small compared to the force (F1). Therefore, due to the rotational force of the first shaft member 232D, the first surface 232D1 and the second surface 313B1 may slide on the first contact surface (C1).

Therefore, generally speaking, the force (F1) can act on the second surface 313B1 through the first contact surface (C1). The force (F1') transmitted to the second surface 313B1 through the first contact surface (C1) can be divided into the axial component force (F1x'; hereinafter referred to as the "moving component force") and the force between the first shaft member 232D The component force in the same direction as the rotation force (F1y'; hereinafter referred to as "rotation component force").

The rotating brush 310 can be rotated by a rotating component (F1y'). Moreover, the rotating brush 310 can be pushed in the second axial direction through the moving component force (F1x'). The ratio of the movement component (F1x') and the rotation component (F1y') is different according to the lead of the first contact surface (C1). The leads of the first contact surface (C1) may be equivalent to the leads of the first surface 232D1 and the second surface 313B1.

The disadvantage of the vacuum cleaner of the prior art 1 is that when the vacuum cleaner is used, the rotating cleaning unit will move in its axial direction due to the reaction force and friction force of the floor. The axial movement of the rotating cleaning unit may generate noise on the contact surface between the rotating cleaning unit and the rotating support unit, and on the contact surface between the first side surface cover, the second side surface cover and the chamber. In addition, the axial movement of the rotary cleaning unit may cause damage to the coupling structure of the first side surface cover, the second side surface cover, and the chamber.

On the contrary, the vacuum cleaner 1 of the present invention may have the advantage that, under the action of the moving component force (F1x'), the rotating brush 310 can be continuously pushed in the second axial direction, even if the floor's reaction force and friction When a force acts in the axial direction, the axial movement of the rotating brush 310 can also be avoided.

The surface area of the first surface 232D1 may gradually decrease toward the second axial direction. Therefore, the surface area of the first contact surface (C1) may gradually decrease toward the second axial direction.

The first surface 232D1 and the second surface 313B1 may be gradually disposed close to the rotation axis of the rotating brush 310 toward the second axial direction. Therefore, the first contact surface may be gradually disposed close to the rotation axis of the rotating brush 310 toward the second axial direction.

Therefore, as the distance of pushing the rotating brush 310 in the second axial direction increases, the moving component (F1x') transmitted to the second surface 313B1 through the first contact surface (C1) can be reduced. Therefore, it is possible to prevent the phenomenon that the rotating fur brush 310 is excessively pushed by the moving component force (F1x') in the second axial direction.

The fourth surface 313B2 of the second transfer portion 313B may extend from the side surface of the shaft body 313A toward the substantially radial direction of the pulley shaft (PA). The fourth surface 313B2 may form a relatively small angle with the radial direction of the pulley shaft (PA).

The fourth surfaces 313B2 may be axisymmetric to each other about the pulley axis (PA). The fourth surface 313B2 may be gradually disposed close to the rotation axis of the rotating brush 310 toward the second axial direction.

The fourth surface 313B2 may form a plane aligned with the axial direction of the rotating brush 310. When the first shaft member 232D pushes the second shaft member 313 in the second axial direction on the first contact surface formed as a spiral, the first shaft member 232D and the second shaft member 313 can maintain the first contact surface while maintaining the first contact surface. , Axially spaced apart from each other.

The first surface 232D1 and the second surface 313B1 may be disposed along the rotation direction of the first shaft member 232D toward the first axial direction. That is, with the single first transmission portion 232DB as the center, the first surface 232D1 and the third surface 232D2 may be closer to each other in the second axial direction.

In addition, with the single second conveying portion 313B as the center, the second surface 313B1 and the fourth The surfaces 313B2 may be closer to each other in the second axial direction.

Therefore, when the first shaft member 232D pushes the second shaft member 313 in the second axial direction through the first contact surface (C1), the third surface 232D2 and the fourth surface 313B2 may be spaced apart from each other. That is, when the first shaft member 232D pushes the second shaft member 313 in the second axial direction through the first contact surface (C1), the fourth surface 313B2 and the third surface 232D2 may not be on the second contact surface (C2) Touch each other.

The fourth surface 313B2 may be a surface that transmits the rotational inertia of the rotating brush 310 to the first shaft member 232D. When the first shaft member 232D is inserted into the second shaft member 313, the fourth surface 313B2 and the third surface 232D2 may form a plurality of second contact surfaces (C2) parallel to the axis of the rotating brush. The second contact surfaces (C2) may be axisymmetric to each other about the rotation axis of the rotating brush 310.

Fig. 38 is a graph showing the force acting on the second contact surface (C2).

After the operation of the driver 200 is stopped, the rotational inertia (Fi) of the rotating brush 310 can be transmitted to the first shaft member 232D through the second contact surface (C2) until the rotating brush 310 stops rotating. Alternatively, when the rotation speed of the motor 220 decreases, the rotational inertia (Fi) of the rotating brush 310 may be transmitted to the first shaft member 232D through the second contact surface (C2).

The rotational inertia (Fi) of the rotating brush 310 may be transmitted to the first shaft member 232D until the second shaft member 313 rotates or stops at the same speed as the first shaft member 232D. The rotation force of the second shaft member 313 applied to the third surface 232D2 through the second contact surface (C2) may act on the third surface 232D2 in the vertical direction.

Therefore, until the second shaft member 313 rotates or stops at the same speed as the first shaft member 232D, the first shaft member 232D and the second shaft member 313 can stably maintain the contact on the second contact surface (C2).

Therefore, the relative movement of the first shaft member 232D and the second shaft member 313 can be minimized, the relative movement being caused by the radially transmitted force during the reduction of the rotation speed of the pulley shaft (PA) to the motor 220.

When the first shaft member 232D is inserted into the second shaft member 313, the sixth surface 313A1 and the fifth surface 232D3 may form a contact surface. The sixth surface 313A1 and the fifth surface 232D3 can be used as boundary surfaces to block the relative movement of the first shaft member 232D and the second shaft member 313, which is caused by the force transmitted in the radial direction of the pulley shaft (PA) .

The seventh surface 313B3 may be a surface connecting the second surface 313B1 and the fourth surface 313B2. The seventh surface 313B3 may connect the second surface 313B1 and the second surface 313B1 in the circumferential direction of the pulley shaft (PA) Four surfaces 313B2. The seventh surface 313B3 of the second transfer part 313B may be axisymmetric to each other about the pulley shaft (PA).

The seventh surface 313B3 may be gradually disposed close to the rotation axis of the rotating brush 310 toward the second axial direction. When all the contact surfaces between the first shaft member 232D and the second shaft member 313 are in close contact with each other, the first shaft member 232D may be inserted into the second shaft member 313. When the first shaft member 232D is inserted into the second shaft member 313, the seventh surface 313B3 may be spaced apart from the hub 232DA.

Although the foregoing description has been provided through exemplary examples of the present invention, those with ordinary knowledge in the technical field can clearly understand that all such and other related modifications and changes shall belong to the broad scope and scope of the present invention as described herein. Inside. Therefore, such modifications and changes should not be regarded as deviating from the spirit and scope of the present invention, and the present invention is intended to cover the modifications and changes of the present invention, provided that these modifications and changes are within the scope of the appended claims and their equivalents. middle.

[Industrial availability]

According to the vacuum cleaner of the present invention, when the first protruding part rotates around the rotation axis of the rotating brush along the guide rail, the first wall body can block the movement of the first protruding part in the direction of the rotation axis, and the extension from the button part The first blocking portion can block the third protrusion from rotating around the rotation axis, so that the housing and the detachable cover can be coupled or decoupled with each other through the rotation of the detachable cover. In this regard, the vacuum cleaner of the present invention overcomes the limitations of the prior art, so it not only has the possibility of making good use of related technologies, but also has the possibility of actually selling related technical equipment. In addition, anyone with ordinary knowledge in the relevant technical field can clearly and practically implement the present invention. Therefore, the present invention has industrial applicability.

This application claims the priority of Korean Patent Application No. 10-2019-0159191 filed with the Korean Intellectual Property Office on December 3, 2019, titled "VACUUM CLEANER", and the content of the entire disclosure is incorporated herein by reference middle.

100: shell

110: main shell

110A: front

111: entrance

120: bottom shell

121: first bottom shell

121A: The first wall surface

122: second bottom shell

130: Assemble the shell

131: Lid

132: Assembly Department

140: Support shell

141: Press the button

150: Side surface cover

200: drive

300: Brush module

310: Rotating brush

312: Brush component

313: Second shaft member

314: Third shaft member

320: Removable cover

321: The cover body

400: Connector

420: The first connection part

430: second connection part

431: release button

450: Flexible straight tube

Claims (8)

A vacuum cleaner includes: a main body configured to generate an air pressure difference; and a suction nozzle configured to suck dust from the floor by using the air pressure difference, wherein the suction nozzle includes: a housing forming an inlet and assembling a Pressing the button, the dust moves into the main body through the inlet; a driver installed in the housing and configured to rotate a first shaft member; a rotating brush configured to rotate when the first shaft member is engaged; and A detachable cover configured to rotatably support one end of the rotating brush, wherein the detachable cover is detachably coupled to the housing by rotating around a rotation axis of the rotating brush, wherein the pressing button can be Selectively blocking the rotation of the detachable cover, wherein a plurality of first protrusions are formed in the detachable cover, and a guide rail is formed in the housing along the circumferential direction of the rotation axis, wherein the guide The rail guides the rotation of the first protrusion around the axis of rotation, wherein a plurality of second walls are formed in the guide rail, and wherein the second walls block the first protrusion around the Rotation of the axis of rotation. The vacuum cleaner of claim 1, wherein a plurality of first walls are formed in the guide rail, and wherein the first walls block the movement of the first protrusions in the direction of the rotation axis. The vacuum cleaner of claim 1, wherein a second protruding portion is formed in the housing, and a guide groove is formed in the detachable cover along the circumferential direction of the rotation axis, and wherein, an inner portion of the guide groove The surface guides the rotation of the second protrusion about the rotation axis. The vacuum cleaner of claim 1, wherein a third protruding portion is formed in the detachable cover, wherein the pressing button includes: a button portion to be pressed by the user; and A first blocking portion extending from the button portion and blocking the rotation of the third protrusion about the rotation axis, and wherein, when the user presses the button portion, the first blocking portion deviates from the third protrusion Part of a rotating route. The vacuum cleaner of claim 4, wherein the button portion is rotatably assembled in the housing, wherein the button portion includes an elastic member interposed between the button portion and the housing, and wherein The first blocking part is arranged on the rotation route of the third protruding part through the elastic force of the elastic member. The vacuum cleaner of claim 5, wherein a fourth protruding portion is formed in the detachable cover, and wherein the pressing button includes a second blocking portion extending from the button portion and blocking the The movement of the fourth protrusion in the direction of the rotation axis. The vacuum cleaner of claim 1, wherein the rotating brush includes: a body having a cylindrical shape; a brush member attached to an outer surface of the body to rub the floor; and a second shaft member, Disposed in an opening on one side of the body, the second shaft member is configured to engage the first shaft member. A vacuum cleaner includes: a main body configured to generate an air pressure difference; and a suction nozzle configured to suck dust from the floor by using the air pressure difference, wherein the suction nozzle includes: a housing equipped with a push button, The housing is configured to roll on the floor; a driver is installed in the housing, the driver is configured to rotate a rotating brush; and a detachable cover is configured to rotatably support the rotating brush, wherein the The detachable cover is detachably coupled to the housing by rotating around a rotation axis of the rotating brush, wherein the pressing button can selectively block the rotation of the detachable cover, Wherein, a plurality of first protrusions are formed in the detachable cover, and a guide rail is formed in the housing along the circumferential direction of the rotation axis, wherein the guide rail guides the first protrusion around the The rotation of the rotation axis, wherein a plurality of second walls are formed in the guide rail, and wherein the second walls block the rotation of the first protrusion around the rotation axis.

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